Process for arresting sulfurous gases and fumes and utilizing the heat and gases contained therein.



G. S. VADNER.

PEoGESS PoE AEEESTING SULPUEOUS GASES AND EUAAES AND UTILIEING THE HEAT AND GASES CONTAINED TEEEEIN. AIILIOATION/ PILEIL 001429, 1013.

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FRQCES EGR RRLESTIHG, SULFURGUS GASES AND FUMES AND UTLIZN THE HEAT .AND GASES CDNTAINED THEBEENQ life messing.

'peciieetion of Letters Patent.

Application e @stoiber 29, 1mg. Serial No. 757W@ To all whom it may confieso.;

Be it known that l, @HARLES Si. Venetia-R e citizen of'fthe United' States, enel o resiieiit ci Salt Lelie Citjyjq Soit Luke county, Utah7 lieve iievented e new and useful Process for Aimesting Suluifous @fases and Fumes and: Utilizing Hest end Gases Contained 'llfaeiein` lit is welll imo-wn. that is Versions smelting opemtios, in roasting ores and in yeifious other operations that produce suluijous geseetlist e large amount of obnoxious tomes one emitted into the sii' end' that'tliese tomes enel gases are a source of annoys ce and injury to4 animal. end vegetable life. iiliiile the mechanical impurities contsined in these fumes can be 'fairly Well arrested by the bsgliouse system and by the use of long lues anni belesg the sulfurous fumes enel gesso are but partially arrested or render-esl innocuous by them. A

The object ci my invention then is to utilise these sulifuro'us tomes and the contained heet and to render them harmless to all forms of life.

Another object olf1 my invention is to proviele en effective anni inexpensive method of recovering zine from ores containing it.

lTo accomplish these objects l make use of the liest ami sulfurcus gases contained in fumes, subjecting oxide, carbonatos and' suiiciently roasted oies containing copper, iron, zinc, leed, arsenic, entimony, cadmium iime end bismuth, in the presence oi' :i suficient quantity ot' Weten' to the action of these snlurous gases. By this means these harmless.

metals are extractedand recovered from the ores and the fumes arrested and rendered lt will be videl-stood that corses Wheie smelten fumes :we not available, self-m1 cen be burnt in oi'eif to povifle the necessary 'sulturous geses for the reduction. of ore. l r v (kids, carbonatos or sufciently roasted ,cites ere gi'ouii to the proper size and showered oi sprayedy .in-water lowntlirough the' first of el series oiE purification towers.'l 'llbeseteweisare of suitable size end, height' eccoicing to the quantity or ore to be 'treated zind the length ot' time the ere iequiresto be'exposefil 'lhe stila'usous fumes ere loci inte these puriicstion towers engi minglegi with the spreyecll one pulp. Ey l 'if desirable inl `means of this spraying, every particle of oie'is subjected to the action of the sulfurous gases, which, in the presence of Water, eifects the solution of the copper and; zinc, some of the iron and arsenic and other metals conta-ined. as aforesaid in the ore. This solution falls to the sump ety 'the bottom of' the tower while the unused gases pass on to the next tower. rlhese towers :we interposed between the points in the lues where the sulfuiveus gases are all united and the point from which they ere nslly voided. The sulfureus fumes are sewn either oy naturel oe svticial draft from the mein flue in the loe-se of the tiret puricetion tower and by s suitebleflue led down into they bese of e second. tower, thence up through the towei and down again to the bese of the thimito2-Wer and so on throughout the series of towers sind iinslly out of the stack. in each tower the fumes come in contact with the-sprayed ore pulp so that the sulfiu'ous gases may have s @hence to unite with the motels, and tali: to the sump et the "bottom, ls-many toweisoen be interposed eteiiteei ept.. i5, 193th l path ofthe fines, the sprayedA ore pulp can be e feel' again to the-successive towers by gravity, otherwise it con be drawn up by pumps. As a precaution against voiding fumes containing appreciable amounts of' sulfurous gases an absoiptiontower containingbouldeis of lime rock'. overt which tiiclles a solution of milk ofv lime is interposed between the last purification tower endl the stack through willich, theumes are inelly voided into 'the atmosphere. Illhe solution of milla of lime is retuignefl to the top of the absorption tower by zin-yy suitable means es long' es it is 'found eicient in neutralizing the traces otsulfurous scid that may escape from the isst purification tower. The resultant cel.- cilumv suite on. exposure to tlie sir is quickly oxiciized to' calcium-sulfate which con be ico diiel ordriecl endl oslciheoif end' used' in the arts. The pur-i-oetiontowers are built drawn and purified and so become a market-, able product. Air under pressure is forced through the solution in this tank and the excessof sulfurous gas is thereby blown out of the solution. `When the ore coming from the solution has only a faint odor, or none at all of sulfurous gas, further air treatment is stopped. If the solution is found to contain copper it is now passed in any'suitable manner over metallic iron. The iron displaces copper in the solution and the copper settles to the bottom whence it may be withdrawn and purified and so become a marketable product. Instead of the use of 1 e metallic iron the sealed cover may be `\moved and the copper recovered by any suitable electrolytic method. After the copper is removed the solution is then oxidized 'with oxygen, chlorin gas or any other suitable oxidizing agent until all of the iron contained in the solution is in the ferrie `condition. The oxidized solution is now cooled and treated in they cold. Finely same causes no effervescence. By this means the Whole of the iron is precipitated as fer'- ric'hydrate which will react with any arsenic present to precipitate the same along with any copper, cadmium and bismuth that'may have escaped previous precipitation. The.

y solution is now allowed to settle and the sediment drawn off, washed and filter pressed and if found to be of any use for its iron contents is sent to the smelter, or worked up if desired, for its-arsenic contents, or if valueless thrown away. The clear solution is now treated with live steam and finely vground calcium carbonatelmtil the solution becomes neutral and the zinc in the course .of two tofour hours treatment is all precipitated in the form of carbonates together with some lime. l decanted. The precipitate is washed and vdecanted and drawn off on to a draining' floor and dried, when the zinc can be recovered by any suitable smelting method. By veffecting a solution ofsaicl carbonate of zinc by exposing samey to the action of sulfurous gases in any of the purification towers, the precipitated carbonate of zinc may be dissolved and the solution drawn oli' in to any suitable treatment tank and the excess of sulfurous gases blown out by air. The

-other metals except'zinc by y fsame in the cold `byl means o a sufficient quantity of finely pulverized calcium carbonate, reheatinguthe solution-and precipi- The solution is settled andsolution may be then electrolyzed by any suitable means and the zinc recovered as metallic zinc. y

y Having described my processwhat I claim is new, and wish to the solution as ferrie arsenite, reheating the solution and\preeipitating the zinc as a basic carbonate by means of additional finely pulverized calcium carbonate.

secure by LettersL 2. The process which consists in recovermg zinc and other metals from naturally oxidized or sufficiently roasted sulfid ores containing zinc andotherV metals by spraying the finely ground pulp of'said ores into smelt-er fumes containing sulfurous gases, eliminating-the copper containedtherein by passing the solution over-metallic iron, oxidizing and treating the solution in the cold with finely pulverized calcium carbonate whereby the ferric hydrate formed reacts. with the arsenic and eliminates same from the solution as ferrie arsenite. v

ground calcium carbonate is now added to the solution until further addition of the 3. The process .which consists in recovering zinc and other metals from naturally.

oxidized or sufficiently roasted sullid ores containing zinc and othermetals by spraying the finely ground pulp of 'said ores into smelter fumes containing sulfurous ases, eliminating the copper contained thereln by passing' the solution over metallic iron, ox-

idizing the solution, and eliminating the recipitating tating the zinc as a basic carbonate by means A of additional finely pulverized calcium ycar- '.bona'te. i

4. The process-which mg zinc and other metals naturally S oxidized. Aor suiiiciently roasteifslfid g containing zinc and other metals except zinc'I by spraying theffinely grounfpulp of said rae ores into smelter fumes containingsulfu;

rous gases, elimi1iating'the-copper therein by passing thev solution-lover metallic iron, oxidizing the 'solution and eliminating lthe other metals by precipitating same the cold by means .of a sufficient quantity-of finely pulverized calcium carbonate andere;

heating the solution and precipitating the* zinc as 'a basic carbonate by means of finely pulverlzed calcium carbonate, and dissolving the basic zinc carbonate in sulfur dioxid and Water and electrolyzing. the solutiorwherebythe zinc is recovered in metallic form.

5. The process which consists in recovering zinc and other metals from naturally oxidized or suliciently roasted suliid ores containing zinc and other metals by spraying the .finely ground pulp of said ores into snielter fumes containing sulfurous gases, i oxidizingthe solution and ridding the solution of the other metals contained'therein by --precipitatingthe same in the cold by means oxidized or sufiiciently roasted `sulfid ores of a suficient quantity of finely pulverized calcium carbonate.

@ The process which consists in recov ei-ing zinc and other metals from naturally containing zinc and other metals by-spraying the iinely ground pulp of ,said ores into smelter fumes containing sulfurous gases,

oxidizing the solution,v and ridding the solution of the other metals contained therein except the zinc by precipitating the same in the cold by means of a suihcient quantity l of linely pulverized calcium carbonate, heating the solution and precipitating the zinc as a basic carbonate by precipitating the same from the hot ysolution by means of finely pulverized calcium carbonate.`

7. The process which consists in recovering zinc. and other metals from naturally oxidized or suiiciently roasted sulid ores containing zinc and other metals by spraying the finely ground pulp of said ores into smelte-r fumes containing sulfurous gases, oxidizing the solutiomand ridding the solution of the other metals containedtheilein except the zinc by precipitating the same in the cold by means of a sufficient quantity of finely pulverized calcium carbonate, reheating the solution and precipitating the zinc as 'a basic carbonate from the hot solution by means of finely pulverized calcium earbonate and dissolving the basic carbonate in sulfur dioxid and Water and electrolyzing the solutionwhereby the zinc is recovered f in metallic form.

- 8. The process of. recovering zlnc and other metals from naturally oxidized and suiiiciently 'roasted suld ores Acontaining zinc and other" metals whichconsists in spraying the finely ground pulp of said `ores' into sulfurous gases, eliminating the copper contained therein by passing the solution over iron, oxidizing the solution, treating same in the cold With finely' pulverized calcium carbonate, whereby the ferrie hydrate reacts with arsenic and eliminates same from the solution as ferrie arsenite, reheating the solution and precipitating the zinc as a basic carbonate by means of additional finely pul verized calcium carbonate, dissolving the zinc carbonate in sulfur dioxid and Water and electrolyzing the solution whereby the zinc is recovered. 4

9, The process of recovering zinc 'and other metals from naturally oxidized and sufficiently. roasted sullid yores containing zinc and other metals which consists in spraying the finely ground pulp of said ores into sulfurous gases, oxidizing the solution, treating same in the cold .with finely pul= verized calcium carbonate, whereby the ferric hydrate reacts with arsenic and eliminates same from the solution as ferrie arsenite, reheating the solution and precipitating the zinc as a basic carbonate by means of additional inely-pulverized calcium carbonate.l

10. The process of recovering zinc and other metals from naturally oxidized and sutliciently roasted sulfid ores containing zinc and other metals Which'consists in spraying the iinely ground pulp of said ores into 'sulfurous gases, oxidizing the solution, treating same in the cold-With finely pulverized calcium carbonate, whereby the ferric hydrate reacts with arsenic and elimiing the zinc as .a .basic `carbonate bly means of additional finely precipitated calcium carbonate, reheating the solution, precipitating the zinc as a basic carbonate by means of additional finely pulverized calcium carbonate, dissolving the zinc carbonate in sulfur dioxid and Water and electrolyzin the solution, whereby the zinc is recovers In Witness whereof I have hereunto set .my hand in the Witnesses. l

` CHARLES S. VADNER. vVitnessesz y MARiUs J1 JAcoBsnN,

Evv OseoRN.

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